Crystal structure of diethyl 3,3'-[(2,4-di-chloro-phen-yl)methyl-idene]bis-(1-indole-2-carboxyl-ate).

In the title compound, CHClNO, the mean planes of the two indole ring systems (r.m.s.

Crystal structure of diethyl 3,3'-[(2-fluoro-phen-yl)methyl-idene]bis-(1-indole-2-carboxyl-ate).

In the title compound, CHFNO, the mean planes of the two indole ring systems (r.m.s.

[Clinical report of 81 cases of multiple primary cancers in laryngeal carcinoma].

Objective: To explore the clinical characteristics and the survival status of the patients with laryngeal squamous cell carcinoma in the multiple primary cancers (MPC).

Methods: Follow-up and clinical data were analyzed retrospectively in 81 laryngeal squamous cell cancer patients with MPC among 1101 patients with laryngeal carcinoma. Survival analysis and every influencing factor on survival rate were performed by Kaplan-Meier method.

Effect of residual chlorine on the analysis of geosmin, 2-MIB and MTBE in drinking water using the SPME technique.

The effect of chlorine on the analysis of three organic compounds (geosmin, 2-methylisoborneol (2-MIB) and methyl tert-butyl ether (MTBE)) in drinking water is elucidated. Three fibers for solid-phase microextraction (SPME) were employed for the extraction of the organic compounds from drinking water samples with and without free residual chlorine present. A gas chromatograph coupled with a mass spectrometer was used to analyze the compounds trapped by the fibers.